From e8cb89577fa15ecb4bfe6c43ece058ed8dd2ae50 Mon Sep 17 00:00:00 2001
From: Meik <meik.drechsler@consulting4it.de>
Date: Thu, 2 Jul 2026 13:28:47 +0200
Subject: [PATCH] fix: parse query parameters from request uri

---
 F4SDM42WebApi/F4SDM42WebApiController.cs | 21 +++++++++++++++++----
 1 file changed, 17 insertions(+), 4 deletions(-)

diff --git a/F4SDM42WebApi/F4SDM42WebApiController.cs b/F4SDM42WebApi/F4SDM42WebApiController.cs
index bfc3d6f..74ea0d3 100644
--- a/F4SDM42WebApi/F4SDM42WebApiController.cs
+++ b/F4SDM42WebApi/F4SDM42WebApiController.cs
@@ -91,12 +91,25 @@ namespace C4IT.F4SD
 
         private string GetQueryValue(string name)
         {
-            if (Request == null)
+            var query = Request?.RequestUri?.Query;
+            if (string.IsNullOrEmpty(query))
                 return null;
 
-            return Request.GetQueryNameValuePairs()
-                .FirstOrDefault(pair => string.Equals(pair.Key, name, StringComparison.OrdinalIgnoreCase))
-                .Value;
+            if (query.StartsWith("?"))
+                query = query.Substring(1);
+
+            foreach (var part in query.Split(new[] { '&' }, StringSplitOptions.RemoveEmptyEntries))
+            {
+                var separatorIndex = part.IndexOf('=');
+                var key = separatorIndex >= 0 ? part.Substring(0, separatorIndex) : part;
+                if (!string.Equals(WebUtility.UrlDecode(key), name, StringComparison.OrdinalIgnoreCase))
+                    continue;
+
+                var value = separatorIndex >= 0 ? part.Substring(separatorIndex + 1) : string.Empty;
+                return WebUtility.UrlDecode(value.Replace("+", " "));
+            }
+
+            return null;
         }
 
         private string BindQueryString(string value, string name)